Finding the Fourth Proportional to 42,710.32, 64,009.76 and 30,903.88

Step by Step Solution

1. Step 1: Write the proportion equation
   42,710.32 : 64,009.76 = 30,903.88 : x
2. Step 2: Convert to fraction form
   42,710.32/64,009.76 = 30,903.88/x
3. Step 3: Cross multiply
   42,710.32x = 64,009.76 × 30,903.88
4. Step 4: Simplify right side
   42,710.32x = 1,978,149,941.87
5. Step 5: Solve for x
   x = 1,978,149,941.87/42,710.32
6. Step 6: Final answer
   x = 46,315.50